Machine for blowing glass articles



March 30,1926. v v 1,578.400

A. N. CRAMER MACHI NE FOR BLOWING GLASS ARTICLES Filed Nov. 21, 1925' 2 Sheets-Sheet 1 ITE-y l- I. 1'

March 30 1926.

' A. N. CRAMER MACHINE FOR BLOWING GLASS ARTICLES Fil' d Nov. 21, 1925 2 Sheets-Sheet 2 Patented Mar. 30, 1926..

UNITED sir ALBERT. N. cnaman, or TOLEDO, 01110, Assmnonro run ownnssorrnn cor/innit,

I or ronnno, OHIO, a CORPORATION or onxo.

MACHINE FOB BLOWING GLASS ARTICLES.

Application filed November 21, 1923. Serial No. 676,135.

To all whom it mag concern:

Be it known that 'I, ALBERT N. ORAMER, a citizen of the United States, residing at Toledo, in the county of Lucas and State of Ohio, have invented new' and useful Improvements in Machines for Blowing Glass Articles, of which the following is a speci'-.

fication.

-My invention relates to glass .blowingv machines and particularly to the molds and parts cooperating directly therewith.

The inventionis shown in connection with a machine of the type 1n wh ch the charge of glass for forming an article is received in a blank mold and a neck mold in register therewith in which the neck of the article is formed. After the formation of the neckend of the article, the blank mold is opened,

leaving'the article supported in the neck mold which then operated to transfer the blank to the finishing mold in which the glass is blown toits finished form. Air for blowing the glass to hollow form in the molds is supplied-through the neck mold. The neck mold comprises arm's'or sections separable for opening and closing the mold,

. which sections carry thimble sections in and aligning the -neck mold arms andwhich the mold cavity is formed. An ada iter in the form of a sleeve or tubular mem er is also employed for positioning thimble.

Heretofoi'e, considerable difliculty has been experienced in maintaining sutliciently tight joints between the sections of the neck'mold and thimble and between said parts and the adapter to prevent excessive leakage of the air sup lied through the adapter to thc'neck mold or blowing the glass. Unless the parts are accurately machined and fitted "to make practically air tight joints, the leaka 0 c I age of air is GXCQSSH'G and the pressure there- .by reduced to such anextent as to interfere withthe proper blowing of the glass.

An object of the present invention is to rovide suitable means for preventin such eakage or reducing it to a neg igible amount, so that a full line pressure may be v maintained at the blowing point and waste of air under; pressure avoided. In the pres- =-ent invention, leakage of air is prevented or reduced to a negligible amount through a novel construction and arrangement ofparts, by whichthe number of joints which must be maintained. tight is' reduced, and,

. applied.

thimble sections from dragging on the neck of the bottle as said sections open. .Tliis dragging causesrapid wear ofathe mold,

which produces defects in the finished ware,

and necessitates the frequent replacement of the mold thimbles by new parts. I v

Other objects of the invention will appear hereinafter.

In the accompanying drawings:

Figure 1 1s a. partsectionatelevation, largely diagrammatic, of a glass blowing provide means to prevent the corners of the machine to which'the present invention is Figure 2is a sectional elevation on a larger scale'of the neck mold and adjoining parts. Figurefi is a section at the plane of-the line III-III on Figure 2, showing the neck .n'iold in open position.

The machine comprises a center column 10 around which-a mold carriage ll rotates. The mold carriage con'ipriscs a .numbero'l'; heads or units, each of which carries a blank .mold 12, a finishing mold 133 and a neck mold. 14. The neck mold is carried by a head 15' which rotaable about a liorizontalaais ,by means of gears 16, 17 to swing the neck mold from a position in register with the blank mold, downward to-the position shown in Figures 1 and 2, in which the neck mold v registers with tl'iel'inishing mold. The 'neck mold'compriscs arms 1.81 mounted on" a pivot pin 19- carried on the blow head 15. "The-- arms 18 carrythe sectional thin'1ble20 coinprising two halves wh ch fit together when the neck mold is olos'edand' are formed with the mold cavity 2'1 in which the'neck 22 of the bottle or other blown articleis formed.

- An adapter 23 is mounted i'n-the lower end ofl'the blow head 15 and provides a means for centering the thimble 20 when-the neck mold closes, supports the thimble sections while the neck mold is opening and provides with the thimblea close joint to prevent leakage of air, as .rnore fully' pointed -tmt hereinafter. The adapter is in the form of a sleeve or tubular member having a central opening Ql forming a continuation of the cylindrical bore of the blow head, in which a plunger 26 reciprocates. lVlien the plunger is projected, the plunger tip 27 forms with the thinible .20 a neck mold cavity in which the neck :l'zZis formed.

The adapter 23 includes flange portions 28 and 2.) which form the upper and lower walls of an annular groove or channel 30. The flange 28 has an extension 31 provided with an opening to receive the pivot pin 19 by which the adapter is held in place on the blow head. The two halves of the thimble are provided 'with tongues 32 which enter the groove and form apractically air tight lit or seal between the adapter and thimble; The upper and lower faces of the tongues 32, as well as the faces of the flanges 28 and 29, are machined to provide an accurate and close fit of said tongues between the flanges. The vertical meeting faces 33 (Fig. 3) of the thimble sections are held together by the mold arms lb to form a seal when the,

' neck mold is closed.

A ftcr a charge of glass has been dropped into the blank mold 12 (Fig. 1) and the,

neck 22 formed in the usual manner, the plunger is withdrawn and air under pres-. sure supplied through the channel 25, 24 for blowing the blank. The initial blowing may take place before the blow head 15 is inverted, and the final blowing after the parts have been brought to the Figure 2 po- 1 sitioii. During this blowing, lea-kageof air from the neck mold can only take placebotween the-meeting faces of the thimble sections 20 or through the-groove. 30. thimble sections are held in accurate alignment bythe tongue and groove 32, 30 and held together by the-neck mold arms, the

leakage between said faces is practically eliminated. ,Escape of, air through the grooves 30 is also prevented or is so slight as to be practically negligible, owing to the fact that the tongues 32 are positively held in the groove 30 with no possibility of the meeting surfaces separating to allow the escape of air. The full line pressure of air is, therefore," readily maintained within the neck mold during the blowing of the glass.

The tongue and groove connection between the adapter and thimble'sections further serves to prevent either one of said sections from sagging with respect to the other. This prevents any offset or irregularity in the upper surface or lip 35 of the finished articleat the point where the thimble sect-ions meet, and thus avoids a very common defect heretofore experienced on account of one 'thimble section sagging below the other. g H The tongue and groove connection ,be-

tween the adapter and thimblesections also serves to hold said sections from sagging and rubbing on the upper surface of the bottle as the neck molds open, because said tongue and groove connection is maintained until the neck mold sections areseparated sufficiently to clear the bottle, 'Wlien the thimble sections are permitted to bear against the edge of the bottle during their opening movement, they are worn rapidly owing to the abrasive action of the glass The result carried respectively by said arms, an adapter arranged to be' surrounded by the'thimble when the mold is closed, said adapter having a supporting surface in a plane perpendicular to said axis,,said thimble sections being formed to engage said supporting surface and thereby support thet-himble sections during their opening and closing movements.

' 2. The combination of a mold comprising a'i'nis hinged to swing about a common axis and a thimble comprising separable sections carried respectively by said arms, and means to'- support said thimble sections and prevent;

them from sagging during their opening and closing movements, said means comprising an adapter arranged to be surrounded by the thiinble when the-Inold-is closed, the adapter being formed with an annular groove on its exterior surface and the thimble sections having tongues to enter said groove, said tongues being formed to fit both the upper and lower surfaces of said groove and the-reby provide a substantially air tight double seal between the adapter and mold.

3. in a machine for blowing glass articles,

the combination of a blowing head, a neck mold comprising arms carried by said head and hinged to swing about a common axis, said mold including a t-l'u'i'nble comprising Sections carried by said arms, said sections being formed with a neck mold cavity, an adapter carried by said head and comprising a cylindrical portion projecting into the tliimble,vsaid adapter and thimble having a, 1

tongue and groove'connection by which a substantially air tight seal is formed between the mold and adapter and by which the thimble is supported during the opening and closing movements of the mold.

, Signed'at Toledo, in the county of Lucas and State of Ohio, this 17th day of Novena: ber,1923. t

ALBERTjN. CRAMER. 

